package com.itheima.reggie.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.itheima.reggie.common.CustomException;
import com.itheima.reggie.entity.Category;
import com.itheima.reggie.entity.Dish;
import com.itheima.reggie.entity.Setmeal;
import com.itheima.reggie.mapper.CategoryMapper;
import com.itheima.reggie.service.CategoryService;
import com.itheima.reggie.service.DishService;
import com.itheima.reggie.service.SetmealService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

@Service
public class CategoryServiceImpl extends ServiceImpl<CategoryMapper, Category> implements CategoryService {

    @Autowired
    private DishService dishService;

    @Autowired
    private SetmealService setmealService;

    @Override
    public void remove(Long id) {
        //添加查询条件,根据分类id 进行查询菜品数据
        LambdaQueryWrapper<Dish> dishLambdaQueryWrapper = new LambdaQueryWrapper<>();
        //查询该id 有没有关联菜品数据
        dishLambdaQueryWrapper.eq(Dish::getCategoryId,id);
        //返回有多少个数据
        int count = dishService.count(dishLambdaQueryWrapper);
        //判断 如果 count > 0 就抛出业务异常
        if (count > 0){
            throw  new CustomException("该分类下,关联了其他菜品,不能删除");
        }

        //查询当前分类下 有没有套餐
        LambdaQueryWrapper<Setmeal> setmealLambdaQueryWrapper = new LambdaQueryWrapper<>();

        //查询该id  有没有关联套餐数据
        setmealLambdaQueryWrapper.eq(Setmeal::getCategoryId,id);
        //返回有多少个数据
        int count1 = setmealService.count(setmealLambdaQueryWrapper);

        //判断如果count > 0 就抛出业务异常 不让删除数据
        if (count1 > 0){

            throw new CustomException("该分类下,关联了其他套餐,不能删除");
        }

        //正常删除分类
        super.removeById(id);
    }
}
